Attachments scrolling on 2ch.hk with mouse wheel

DvachScroll.js

// ==UserScript==
// @name		DvachScroll
// @version		0.1
// @description	Attachments scrolling on 2ch.hk with mouse wheel
// @author		Sdore
// @match		http://2ch.hk/*
// @match		https://2ch.hk/*
// ==/UserScript==

(function() {
	console.log('[DvachScroll] Started');
	MExpandMedia.onwheel = function(e) {
		e.preventDefault();
		let evt = window.event || e;
		evt = evt.originalEvent?evt.originalEvent:evt;
		MExpandMedia.onkeyup({keyCode: (evt.detail?-evt.detail:evt.wheelDelta)>0?37:39});
	};
	console.log('[DvachScroll] Patched');
})();